CN103982693B - Great power bidirectional without return spring containing permanent magnet electromagnetic valve - Google Patents

Abstract

Great power bidirectional without return spring containing permanent magnet electromagnetic valve, belong to solenoid valve market, the present invention solves traditional solenoid valve to have the response time slow, the problem that ouput force is low.The present invention program: the symmetrical configuration of upper magnetic circuit part and lower magnetic circuit part is arranged, and is linked together by connecting rod of armature and shell connecting ring; Upper magnetic circuit part comprises top iron core, upper case, upper coil, upper, annular permanent magnet, top yoke and upper push-rod; Lower magnetic circuit part comprises bottom iron core, lower case, lower coil, lower annular permanent magnet, bottom yoke and lower push-rod; Bistable magnetic keeps, and permanent magnet adjustment confining force is adjustable, and the response time is fast, and ouput force is high.

Description

High-power two-way non-return spring solenoid valve with permanent magnet

technical field

The invention relates to a high-power two-way solenoid valve with permanent magnets without return spring, which belongs to the field of solenoid valves. Solenoid valve with permanent magnet specifically refers to a solenoid valve with a permanent magnet inside.

Background technique

Solenoid valve is an industrial equipment controlled by electromagnetic. It is an automatic basic component used to control fluid. It belongs to actuator and is not limited to hydraulic and pneumatic. It is used to adjust the direction, flow, speed and other parameters of the medium in the industrial control system. Solenoid valves can cooperate with different circuits to achieve the expected control, and the control accuracy and flexibility can be guaranteed. There are many kinds of solenoid valves. Different solenoid valves play a role in different positions of the control system. The most commonly used ones are check valves, safety valves, directional control valves, and speed regulating valves.

However, the traditional solenoid valve has the disadvantages of slow response time and low output force, which cannot meet the needs of industrial production under certain circumstances.

Contents of the invention

The purpose of the present invention is to solve the problems of slow response time and low output force of the traditional solenoid valve, and provide a high-power bidirectional solenoid valve with permanent magnet without return spring.

The high-power two-way non-return spring containing permanent magnet solenoid valve of the present invention includes an upper magnetic circuit part, a lower magnetic circuit part, an armature connecting rod and a shell connecting ring, and the structures of the upper magnetic circuit part and the lower magnetic circuit part are arranged symmetrically , and are connected together through the armature connecting rod and the shell connecting ring;

The upper magnetic circuit part includes an upper iron core, an upper casing, an upper coil, an upper annular permanent magnet, an upper yoke and an upper push rod; the upper casing is a barrel-shaped structure with an upward opening, and the upper opening of the upper casing is provided with an upper yoke. The center hole of the upper yoke is used to accommodate the up and down movement of the push rod; the upper push rod is arranged on the upper end of the upper iron core, and the center hole at the bottom of the upper shell is used to accommodate the up and down movement of the upper iron core; the inner wall of the upper shell is provided with an upper An annular permanent magnet, an upper coil is arranged between the upper annular permanent magnet and the bottom of the upper shell; there is an air gap between the inner hole of the upper annular permanent magnet and the outer surface of the upper iron core; the inner surface of the central hole at the bottom of the upper outer shell is connected to the upper There is an air gap between the outer surfaces of the core;

The lower magnetic circuit part includes a lower iron core, a lower casing, a lower coil, a lower annular permanent magnet, a lower yoke and a lower push rod; the lower casing is a barrel-shaped structure with an opening downward, and the lower opening of the lower casing is provided with a lower yoke , the central hole of the lower yoke is used to accommodate the up and down movement of the lower push rod; the lower push rod is arranged at the lower end of the lower iron core, and the central hole on the top of the lower shell is used to accommodate the up and down movement of the lower iron core; the inner wall of the lower shell is provided with The lower annular permanent magnet, the lower coil is arranged between the lower annular permanent magnet and the top of the lower shell; there is an air gap between the inner hole of the lower annular permanent magnet and the outer surface of the lower iron core; the inner surface of the central hole at the top of the lower outer shell and the There is an air gap with the outer surface of the lower core;

The lower end of the upper iron core and the upper end of the lower iron core are fixed together by an armature connecting rod;

The upper shell and the lower shell are connected together through the shell connecting ring, the upper ring of the shell connecting ring is fixedly connected with the edge of the central hole at the bottom of the upper shell; the lower ring of the shell connecting ring is fixed with the edge of the central hole of the lower shell connect.

Advantages of the present invention: the high-power two-way non-return spring-containing permanent magnet solenoid valve of the present invention has a symmetrical structure and is simple to assemble; bistable magnetic holding, permanent magnet adjustment and holding force can be adjusted, and can be obtained with different reaction force designs. Flexible configuration; low triggering conditions, small pull-in (release) ampere-turns, low power, fast response time, and high output force.

The permanent magnet is far away from the main contact and the area where the interrupter is located, which can reduce the adverse effect of high temperature on the permanent magnet. At the same time, the structure has good anti-vibration performance, the actual assembly is more efficient, the consistency of the same batch of products is enhanced, and the batch size is reduced. The reject rate of the product.

Description of drawings

Fig. 1 is the structural representation of the high-power two-way non-return spring containing permanent magnet solenoid valve of the present invention;

Fig. 2 is the magnetic flux path diagram when the upper and lower coils are not energized, which is the initial position at this moment;

Fig. 3 is the magnetic flux path diagram at the initial moment when the upper and lower coils pass forward electricity;

Fig. 4 is the magnetic flux path diagram after the upper and lower coils pass forward electricity to complete the change from bottom to top movement form, and at this time, it is the position after completing the change from top to top movement form;

Figure 5 is a magnetic flux path diagram when the upper and lower coils are powered off;

Fig. 6 is the magnetic flux path diagram at the initial moment when the upper and lower coils pass the reverse current;

Figure 7 is a diagram of the magnetic flux path after the upper and lower coils are energized in reverse to complete the change from top to bottom, and return to the initial position at this time.

detailed description

Specific Embodiment 1: The present embodiment will be described below in conjunction with Fig. 1 to Fig. 7. The high-power two-way non-return spring-containing permanent magnet solenoid valve described in this embodiment includes an upper magnetic circuit part, a lower magnetic circuit part, and an armature connecting rod. 7 and the shell connecting ring 14, the structure of the upper magnetic circuit part and the lower magnetic circuit part are arranged symmetrically, and are connected together by the armature connecting rod 7 and the shell connecting ring 14;

The upper magnetic circuit part includes an upper iron core 8, an upper casing 9, an upper coil 10, an upper annular permanent magnet 11, an upper yoke 12 and an upper push rod 13; The upper opening is provided with an upper yoke 12, and the center hole of the upper yoke 12 is used to accommodate the upper push rod 13 to move up and down; The upper iron core 8 moves up and down; the inner side wall of the upper casing 9 is provided with an upper annular permanent magnet 11, and an upper coil 10 is arranged between the upper annular permanent magnet 11 and the bottom of the upper casing 9; the inner hole of the upper annular permanent magnet 11 is connected to the upper There is an air gap between the outer surfaces of the iron core 8; there is an air gap between the inner surface of the central hole at the bottom of the upper shell 9 and the outer surface of the upper iron core 8;

The lower magnetic circuit part includes a lower iron core 6, a lower casing 5, a lower coil 4, a lower annular permanent magnet 3, a lower yoke 2 and a lower push rod 1; the lower casing 5 is a barrel-shaped structure with an opening downward, and the lower casing 5 The lower end opening of the lower yoke is provided with a lower yoke 2, and the center hole of the lower yoke 2 is used to accommodate the lower push rod 1 to move up and down; the lower push rod 1 is arranged at the lower end of the lower iron core 6, and the center hole on the top of the lower shell 5 is used The lower iron core 6 is accommodated to move up and down; the inner side wall of the lower casing 5 is provided with a lower annular permanent magnet 3, and a lower coil 4 is arranged between the lower annular permanent magnet 3 and the top of the lower casing 5; the inner hole of the lower annular permanent magnet 3 and There is an air gap between the outer surfaces of the lower iron core 6; there is an air gap between the inner surface of the center hole at the top of the lower shell 5 and the outer surface of the lower iron core 6;

The lower end of the upper iron core 8 and the upper end of the lower iron core 6 are fixed together by the armature connecting rod 7;

The upper shell 9 and the lower shell 5 are connected together by the shell connecting ring 14, and the upper ring of the shell connecting ring 14 is fixedly connected with the edge of the central hole at the bottom of the upper shell 9; the lower ring of the shell connecting ring 14 is connected with the lower shell The edge of the center hole of 5 is fixedly connected.

The upper push rod 13, the upper iron core 8, the armature connecting rod 7, the lower iron core 6 and the lower push rod 1 constitute moving parts. When moving upward, the upper push rod 13 protrudes upward from the center hole of the upper yoke 12 until the upper The upper end of the iron core 8 contacts the upper yoke 12 and stops; when moving downward, the lower push rod 1 protrudes downward from the center hole of the lower yoke 2 until the lower end of the lower iron core 6 contacts the lower yoke 2 and stops.

The structures of the upper magnetic circuit part and the lower magnetic circuit part are mirror symmetrical.

Both the upper annular permanent magnet 11 and the lower annular permanent magnet 3 are radially magnetized, and the directions of magnetization are the same.

The upper iron core 8, the lower iron core 6, the upper yoke 12, the lower yoke 2, the upper shell 9 and the lower shell 5 are all made of high magnetic permeability materials.

The upper iron core 8 and the lower iron core 6 are cylindrical, and the longitudinal section is rectangular.

Both the upper coil 10 and the lower coil 4 are realized by being wound on a bobbin.

Referring to Fig. 1, it is assumed that the upper annular permanent magnet 11 and the lower annular permanent magnet 3 are both inside N and outside S, and their working process will be described in detail below.

Fig. 2 shows the state that neither the upper coil 10 nor the lower coil 4 is energized. At this time, they are in the initial position. Due to the gravity factor, the lower end surface of the lower iron core 6 is pressed on the lower yoke iron 2, and the lower end surface of the lower iron core 6 and the lower yoke The contact between iron 2 is almost no gap, and the magnetic flux only goes to the position of the minimum reluctance, so there is only one permanent magnetic flux path in the lower magnetic circuit: the N pole of the lower annular permanent magnet 3 → the lower iron core 6 → the lower yoke Iron 2 → lower casing 5 → S pole of the lower annular permanent magnet 3 → N pole of the lower annular permanent magnet 3, the suction between the lower annular permanent magnet 3 and the lower iron core 6 keeps the moving parts at the initial position shown in Figure 1 Location. There are two parallel permanent magnetic flux paths in the upper magnetic circuit part, the first path is: the N pole of the upper annular permanent magnet 11 → the upper iron core 8 → the gap between the upper iron core 8 and the upper yoke 12 → the upper part Yoke 12 → upper shell 9 → S pole of upper annular permanent magnet 11 → N pole of upper annular permanent magnet 11; the second path is: N pole of upper annular permanent magnet 11 → upper iron core 8 → upper iron core 8 and the gap between the upper casing 9 → the upper casing 9 → the S pole of the upper annular permanent magnet 11 → the N pole of the upper annular permanent magnet 11.

Fig. 3 is the state that the upper coil 10 and the lower coil 4 are connected to the positive current at the same time, so that the electromagnetic flux in the direction shown in Fig. 3 is generated when the positive current is applied, and the electromagnetic flux path generated by the lower coil 4 is: the lower iron core 6 → Lower shell 5 → Lower yoke 2 → Lower iron core 6, the electromagnetic flux generated by the lower coil 4 is opposite to the lower permanent magnetic flux in the lower iron core 6, and the electromagnetic flux will always weaken the lower permanent magnetic flux , that is, the initial downward composite magnetic flux in the lower iron core 6 will become weaker and weaker until it reaches 0, and then reversed, and the composite magnetic flux will go upward; the electromagnetic flux path generated by the upper coil 10 is: upper iron core 8→upper Air gap between iron core 8 and upper yoke 12 → upper yoke 12 → upper casing 9 → air gap between upper casing 9 and upper iron core 8 → upper iron core 8, electromagnetic flux generated by upper coil 10 In the upper Iron Art 8, the direction of the first permanent magnetic flux is the same as that of the second permanent magnetic flux. Two permanent magnetic fluxes, as the electromagnetic flux continuously strengthens the first permanent magnetic flux, and continuously weakens the second permanent magnetic flux, when the combined magnetic flux of the lower iron core 6 and the upper iron core 8 When the resultant force of the magnetic flux is upward, the moving parts start to move upward until the upper end surface of the upper iron core 8 pushes against the lower surface of the upper yoke 12, as shown in Figure 4, and the movement form changes from bottom to top. If the positive current is always connected, the state shown in Figure 4 will always be maintained. In the position shown in Fig. 4, there is only one permanent magnetic flux in the upper magnetic circuit part, and two parallel permanent magnetic fluxes in the lower magnetic circuit part.

If the upper coil 10 and the lower coil 4 are powered off at the same time, the two electromagnetic fluxes generated by the upper coil 10 and the lower coil 4 will naturally disappear. Referring to Figure 5, there is only one permanent magnetic flux path in the upper magnetic circuit. : the N pole of the upper annular permanent magnet 11 → the upper iron core 8 → the upper yoke 12 → the upper casing 9 → the S pole of the upper annular permanent magnet 11 → the N pole of the upper annular permanent magnet 11; the upper iron core 8 and the upper annular permanent magnet The attractive force between the magnets 11 keeps the upper iron core 8 at this position; there are two parallel permanent magnetic flux paths in the lower magnetic circuit part, the first path: the N pole of the lower annular permanent magnet 3→the lower iron core 6→the lower part The air gap between the iron core 6 and the lower yoke 2 → the lower yoke 2 → the lower housing 5 → the S pole of the lower annular permanent magnet 3 → the N pole of the lower annular permanent magnet 3, the second path: the lower annular permanent magnet 3 The N pole → the lower iron core 6 → the air gap between the lower iron core 6 and the lower casing 5 → the lower casing 5 → the S pole of the lower annular permanent magnet 3 → the N extremely of the lower annular permanent magnet 3. The directions of the two permanent magnetic fluxes in the lower iron core 6 are opposite, but their combined magnetic flux will be smaller than the magnetic flux in the upper iron core 8, so the moving parts will not change their positions.

If at this time the upper coil 10 and the lower coil 4 pass reverse current simultaneously, then produce the electromagnetic flux as shown in Figure 6, this electromagnetic flux is opposite to the electromagnetic flux direction of Figure 4 when passing forward electricity, the upper magnetic flux The electromagnetic flux of the circuit part weakens the upper permanent magnet flux, and the electromagnetic flux of the lower magnetic circuit part superimposes and strengthens with the first permanent magnet flux, weakens the second permanent magnet flux, and the resultant force is continuously downward. The specific process is related to the flux. On the contrary, when the power is forward, the moving parts start to move downward when the resultant force is downward, until the lower end surface of the lower iron core 6 is pressed against the lower yoke 2, and the change of motion form from top to bottom is completed, as shown in Figure 7.

In different states of power on and power off, the magnetic circuit shown in Fig. 2 to Fig. 7 acts, the permanent magnets (upper annular permanent magnet 11, lower annular permanent magnet 3) provide the holding force in a stable state, and the iron core (lower part) Iron core 6, upper iron core 8) are the devices that undertake the switching action, and the yokes (upper yoke 12, lower yoke 2) are the devices that undertake the armature limit, with them as the center, connect the coil core, etc. The entire magnetic circuit of the solenoid valve composed of other devices directly determines the performance of the whole machine containing the permanent magnet solenoid valve; the magnetic circuit and its corresponding structural design can greatly improve the utilization efficiency of the permanent magnet; the magnetic circuit with efficient magnetic flux confinement and simple structure , which can make the actual assembly of the product more efficient, the consistency of the same batch of products is better, and the scrap rate of the batch of products can be reduced.

Claims (5)

1. The high-power two-way non-return spring containing permanent magnet solenoid valve is characterized in that it includes an upper magnetic circuit part, a lower magnetic circuit part, an armature connecting rod (7) and a shell connecting ring (14), an upper magnetic circuit part and The structure of the lower magnetic circuit part is arranged symmetrically, and is connected together through the armature connecting rod (7) and the shell connecting ring (14); The upper magnetic circuit part includes an upper iron core (8), an upper casing (9), an upper coil (10), an upper annular permanent magnet (11), an upper yoke (12) and an upper push rod (13); the upper casing (9 ) is a barrel-shaped structure with an upward opening. The upper opening of the upper shell (9) is provided with an upper yoke (12), and the center hole of the upper yoke (12) is used to accommodate the upper push rod (13) to move up and down; The rod (13) is arranged on the upper end of the upper iron core (8), and the central hole at the bottom of the upper casing (9) is used to accommodate the upper iron core (8) to move up and down; the inner side wall of the upper casing (9) is provided with an upper annular permanent Magnet (11), an upper coil (10) is arranged between the bottom of the upper annular permanent magnet (11) and the upper casing (9); the inner hole of the upper annular permanent magnet (11) and the outer surface of the upper iron core (8) There is an air gap between them; there is an air gap between the inner surface of the central hole at the bottom of the upper casing (9) and the outer surface of the upper iron core (8); The lower magnetic circuit part includes a lower iron core (6), a lower casing (5), a lower coil (4), a lower annular permanent magnet (3), a lower yoke (2) and a lower push rod (1); the lower casing (5 ) is a barrel-shaped structure with an opening downward, the lower opening of the lower housing (5) is provided with a lower yoke (2), and the center hole of the lower yoke (2) is used to accommodate the lower push rod (1) to move up and down; The push rod (1) is arranged at the lower end of the lower iron core (6), and the central hole on the top of the lower casing (5) is used to accommodate the movement of the lower iron core (6) up and down; the inner side wall of the lower casing (5) is provided with a lower annular A permanent magnet (3), a lower coil (4) is arranged between the lower annular permanent magnet (3) and the top of the lower shell (5); the inner hole of the lower annular permanent magnet (3) and the outer surface of the lower iron core (6) There is an air gap between the surfaces; there is an air gap between the inner surface of the central hole at the top of the lower shell (5) and the outer surface of the lower iron core (6); The lower end of the upper iron core (8) and the upper end of the lower iron core (6) are fixed together by the armature connecting rod (7); The upper shell (9) and the lower shell (5) are connected together by the shell connecting ring (14), and the upper ring of the shell connecting ring (14) is fixedly connected with the edge of the center hole at the bottom of the upper shell (9); The lower circular ring of connecting ring (14) is fixedly connected with the edge of the center hole of the top of lower housing (5). 2. according to claim 1, the high-power two-way non-return spring containing permanent magnet solenoid valve is characterized in that, the upper annular permanent magnet (11) and the lower annular permanent magnet (3) are radially magnetized, and the magnetized same direction. 3. according to claim 1, the high-power two-way non-return spring containing permanent magnet solenoid valve is characterized in that, the upper iron core (8), the lower iron core (6), the upper yoke (12), the lower yoke ( 2), the upper shell (9) and the lower shell (5) are made of high magnetic permeability material. 4. The high-power two-way non-return spring containing permanent magnet solenoid valve according to claim 1, characterized in that, the upper iron core (8) and the lower iron core (6) are cylindrical, and the longitudinal section is rectangular. 5. The high-power two-way non-return spring-containing permanent magnet solenoid valve according to claim 1, characterized in that, the upper coil (10) and the lower coil (4) are all realized by being wound on the bobbin.